Roadmap
Day 36 · Experiments 55 min 40 XP
🅰️A/B testing
An A/B test is the cleanest tool an analyst has for answering 'did this change work?'. Random assignment turns correlation into cause, if you plan it properly.
What you'll learn
- Design a test with one metric, one change and random assignment
- Test two conversion rates with a z-test in Sheets
- Avoid the classic traps: peeking, tiny samples and stopping early
A peek inside
Design before data
The rest of Day 36 is a Pro lesson
You're on the free Explorer plan — you get the intro and the video. Go Pro to open the full guided lesson (and all 30 days).
- 3 deep-dive lessons
- A copy-paste worked example
- 3 hands-on practice tasks
- Studio task: Test a checkout button
- 3-question quiz, up to 45 XP
- 4 quick-glance glossary cards
- 40 XP + streak tracking
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